Maggie Rizer & Husband Expecting Baby No. 2

The 34-year-old model and her husband are expecting another baby boy to join their family early next spring, Maggie tells PEOPLE. The baby is due March 23rd and will be a sibling for the couple’s son Zander, 11 months.

“Alex and I always wanted a big family,” she explains. “We want to have as many kids as we can — within reason.”

Having two children so close in age “will be just about the sweetest thing in the world,” she adds. “A made-for-you best friend. We feel incredibly blessed.”

And when it comes to her tiny tot, Maggie claims he is a very happy baby.

“He’s hysterical. He’s happy,” she says of her son. “He’s standing by himself now, clapping and waving.”

“It’s so amazing,” she continues. “that they come out as blobs and they develop into these real little people with great personalities.”